Canon EF Sigma 20mm F1.8 EX DG Aspherical RF

Sigma 20mm F1.8 EX DG Aspherical RF
Canon EF

Autofocus
Sigma 20mm F1.8 EX DG Aspherical RF

Review

The Sigma 20mm F1.8 EX DG Aspherical RF lens for Canon EF mount is a versatile and unique lens that holds significant appeal for photographers who enjoy capturing wide-angle shots with a fast aperture. Its construction and design offer both quality performance and aesthetic benefits, making it a worthy contender in the realm of wide-angle lenses.

Build and Design

The Sigma 20mm F1.8 sports a robust build quality that's characteristic of the EX series lenses. It's designed with a solid all-metal body, which gives it a professional feel. The lens has a nice weight to it, adding to the stability while shooting. Additionally, the large front element, coated with Sigma's Super Multi-Layer Coating, helps to minimize flare and ghosting, ensuring clearer images even in challenging lighting situations.

Optical Performance

This lens excels at producing sharp images with vibrant colors. The F1.8 aperture allows for excellent low-light performance, making it suitable for various types of photography, including astrophotography and indoor events. The aspherical element contributes to reduced distortion, which is often a concern with wide-angle lenses, helping to maintain image integrity across the frame.

Autofocus and Handling

The autofocus system is relatively fast and accurate, although there might be instances of slower focusing in low-light conditions. It features a manual focus override, which is a convenient addition for those who prefer to have total control over their focus points. The lens has a minimum focusing distance of approximately 20 cm, allowing photographers to explore creative compositions with close-up shots as well.

Versatility

The 20mm focal length makes this lens a great option for landscape, architecture, and street photography. Its wide angle provides expansive views, and when combined with the fast F1.8 aperture, allows for stunning depth-of-field effects.

Pros and Cons

Pros

  • Fast F1.8 aperture for low-light capabilities
  • Excellent build quality with a solid design
  • Minimal distortion and impressive sharpness
  • Great for various photography styles, including landscapes and street photography

Cons

  • Autofocus can be sluggish in low-light environments
  • Slightly heavier than some competitors
  • The front element may be prone to scratches without proper care

Verdict

The Sigma 20mm F1.8 EX DG Aspherical RF lens for Canon EF mount stands out as a strong choice for photographers looking for a high-performance wide-angle lens. Its combination of build quality, fast aperture, and excellent optical performance makes it an excellent addition to any camera bag. While it may have some minor downsides, the benefits far outweigh them, making it a worthwhile investment for both amateur and professional photographers alike.

Technical Specifications

20mm
min focal length
20mm
max focal length
f1.8
max f (min zoom)
f1.8
max f (max zoom)
82mm
Filter diameter
20cm
min focus distance
f22
min. aperture
520g
Weight
13
Elements
11
Groups
90mm
Length
89mm
Diameter
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